Not showing on Blog Page, only on Single posts

Hi,

I believe I’ve found a bug around line 1335 of addthis_social_widget.php:

// Pages
    elseif ( is_page() )
        $display = (isset($options['addthis_showonpages']) && $options['addthis_showonpages'] == true) ? true: false;

Here is what I think is happening. You are hooked onto the_content filter, which usually gets called from within The Loop. However, you are using is_page(), which explicitly in the docs does not work from within The Loop. What is more appropriate, is to make use of the 2nd paramater for filters on the_content, and then call is_page() and pass the ID of the current post in case you’re within the loop.

Here is a code sample from the plugin I maintain, in case it is useful:

add_filter('the_content', 'myplugin_add_to_post', 999, 2);

function myplugin_add_to_post($content, $id = NULL) {
    if (empty($id)) $id = get_the_ID();

    // Workaround for bug in WP < 3.3 where title filters are passed the entire post object instead of just the id
    if (isset($id, $id->ID)) {
        $id = $id->ID;
    }

    // Now it is safe to assume the $id is correct
    if (is_page($id)) {
        // Do something (or not)
    }
}

I apologize in advance if the formatting is terrible. There is no preview functionality.

http://wordpress.org/extend/plugins/addthis/